Snap button fastener



FIG. 1 is a side view of my new design snap button fastener.

FIG. 2 is a top view of my new design snap button fastener.

FIG. 3 is a bottom view of my new design snap button fastener.

FIG. 4 is a front end view of my new design snap button fastener; and,

FIG. 5 is a back end view of my new design snap button fastener.

The ornamental design for a snap button fastener, as shown and described. 